Slow ssh connectivity with Ubuntu

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On my Ubuntu 7.10 system, connecting to certain hosts using ssh takes approximately 15 seconds. The culprit appears to be "Unspecified GSS failures" using GSSAPIAuthentication. 

$ ssh -v host
...
debug1: Authentications that can continue: publickey,gssapi-with-mic,password,hostbased
debug1: Next authentication method: gssapi-with-mic
debug1: Unspecified GSS failure.  Minor code may provide more information
No credentials cache found 

debug1: Unspecified GSS failure.  Minor code may provide more information
No credentials cache found 

debug1: Unspecified GSS failure.  Minor code may provide more information
...

As a workaround, disable GSSAPIAuthentication in the ssh client-side configuration (/etc/ssh/ssh_config for all users, ~/.ssh/config for an individual user).

e.g., modifying /etc/ssh/ssh_config 

$ sudo perl -p -i.$(date +%Y%m%d) -e '/^#/ or s/GSSAPIAuthentication yes/GSSAPIAuthentication no/' /etc/ssh/ssh_config
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